How much does the Campaign Monitor API actually cost?
Campaign Monitor publishes an API, but per-tier gating wasn't extracted automatically.
- Most likely scenario: API access is either included in all paid plans, or it's gated to higher tiers and we need to verify on the live docs page.
- Until verified, treat the question "which plan unlocks the API" as open. Don't budget on the assumption it's free with the cheapest paid plan.
API at a glance
Campaign Monitor also has an MCP server
If you're wiring Campaign Monitor into Claude / Cursor / Codex, the MCP server is usually less code than the REST API.
See Campaign Monitor MCP pageWhat you can build with the Campaign Monitor API
Three personas, three different shapes of build. Pick the row that matches how you actually ship.
Glue Campaign Monitor into your daily workflow
- Pull a digest of campaign performance into your morning Slack
- Trigger a one-off backfill when something looks off
- Pipe data into your own SQLite for ad-hoc queries
Sell Campaign Monitor reporting at scale
- White-label Campaign Monitor data into client-branded dashboards
- Run scheduled multi-account reports without logging into the Campaign Monitor UI
- Cross-reference with the rest of the client's stack (CRM, analytics, ad spend)
Production pipelines for Campaign Monitor
- Real-time sync into your warehouse on a cron
- Custom alerts the dashboard's built-in alerting can't express
- Backfill + idempotency handling for Campaign Monitor data older than the dashboard exposes
Quickstart template
# Starter template — endpoint paths and SDK package names come from # the Campaign Monitor API docs: https://www.campaignmonitor.com/api/ curl -X GET "https://www.campaignmonitor.com/<your-endpoint>" \ -H "Authorization: Bearer $TOKEN" \ -H "Accept: application/json" | jq .
Template only. Endpoint paths, exact base URL, and auth header format come from campaignmonitor.com/api.
Limits and gotchas
- No OpenAPI spec — you write typed clients by hand or use a third-party generator on the docs HTML.
- No official SDK detected. Plan on hitting the API directly with your HTTP client of choice.
- Rate limits: always read the docs page before scaling — the published limit is usually lower than the practical one and overages can be expensive.
- No-code fallback: Zapier and Make.com cover the common triggers if you want to skip writing API code for simple flows.
Agent-readiness verdict
Skip for agent workflows. Campaign Monitor has public API documentation but no MCP server, OpenAPI spec, or SDK support, leaving agents unable to integrate meaningfully. The lack of webhooks and structured outputs further limits real-time automation potential.
Campaign Monitor API FAQ
Does Campaign Monitor have a public API?+
Should I use the API or the MCP server for Claude / Cursor / Codex?+
Sources
- Campaign Monitor official site: https://www.campaignmonitor.com/
- API docs: https://www.campaignmonitor.com/api/
- MCP server: https://github.com/pauliowest/cmon-mcp
10+ years in digital marketing. I review marketing software for AI-stack fit: real pricing, MCP and API support, and how cleanly each tool drops into an AI agent workflow, cross-checked against verified data and real user feedback.